Institute Newton C. Braga

Circuit Bench

Speed control (CB23683E)
This circuit with SCR is from a Radio Electronics magazine from September 1965. It is a commercial...
Radar Detector (CB24979E)
This circuit was found in the July 1986 issue of Radio Electronics magazine. The circuit has a...
Scale Expander for 12V Meter (CB21330E)
This circuit was found in a QST from the 1990s. The circuit expands the scale of a 10V instrument to...